Spring assembly



Dec. 1934. w. E. WUNDERLICH 1,982,941

SPRING ASSEMBLY Filed May 18, 1931 Patented Dec. 4, 1934 PATENT/OFFICE- v jisszsn I seams assumin 'tioncllndiana Application May 1s, 1931,.861'181 at. 538,202

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- 'This invention relates to spring assemblies and more particularly to spring-assemblies for mattresses, cushions" and the like. Y

Y My invention is of particular service in relation-to spring cushion assemblies which employ axially compressible main coil'springs arranged in rows that are side by s'ide. and small diameter connecting helicals crossing the aforesaid rows at theadiace'nt portions or the terminal coils of the springs constituting the rows and margining the Amongother objects, the invention aims to provide a spring, assembly that is simple in construction and is atthe same timeboth flexible. and

is quately resistant-to distortion. To accomplish this result, my invention is inclusive of a new and improved construction for interconnecting the springs that is strong and noiseless and that prevents relative displacement of the individual g'o' springs with rererence to each other and said interconnecting means.

A further object is to provide improved means for maintaining the springs of the assembly in spaced relation.

7 as Other objects-and advantages will be apparent from the following description taken together with the accompanying drawing, forming a part or this specification, which illustrate one embodiment of the invention.

so n tbe unwi s- I'igurelisaaticplanvlewota spring assembly embodying my invention. I

Figure 2 is a side elevation or the structure of Figure 1. a5 anure: is a fragmentary plan view on a larger e. Figure tisasectionalviewonthelineH of Figure 8, and v Flgureiiisaaectiontakenonthelineli-boi 4'0 Figure 8. a

The spring cushion assembly or bed bottom here illustrated is inclusive of parallel elongated axially compressible coil springs arranged inrows thataresidebyside,thespringsl',2,3 andd 5 together constituting'one oi the parallel longitudinal rows, for example. Interior connectin spring helicals 5, which are oi much less diameter thanthecoilspringsparalleltheai'oresaidrows attheadiacentportionsoitheterminalcoilslia 6'0 0! the springs constituting the rows. Helicals 6b. similar to helicals 5, margin the spring assembly. The adiacent portions 01' the terminal coils of thecoilsprings whicharelocatedwheretheheli- 4 cals parallel the rows oicoilsprings are each 615 odsettoprovideaportionwhichis nmh the interior connecting he1lu'ai passingtheiebe- I tween. Also the portions of the terminalcoils which margin the spring assembly are provided with'oflset portions for engagement by a mar ginal connecting helical. These ofiset portions desirably include substantially straight portions and peripherally projecting or bulged onsets, these portions cooperating with each other-and with the connecting helicals to maintain the prings inassembly, and particularly to hold the as end prings of the rows from relative lateral movement.

- In the illustrative construction, the interme-' diate coil springs 2 and 3 of alternate rows are slightly staggered, thus presenting substantially aligned straight oflsets 8 which are engaged by one of the interior connecting helical's 5.

As here shown, the end coil springs 1 of both alternate and adjacent rows are abreast of each other and have a straight onset portion 'l of one 7'5: terminal coil transversely aligned with similar portions 7 of other springs at said end and in staggered relation to or longitudinally aligned with other portions, such as the bulged oilsets 8 r on an adJacent terminal coil in an adjacent row. 6 In this instance, each straight oilset portion '1 lies between two bulged oil'sets 8. The coil springs 4 at the other end of the assembly are arranged similarly to the end coil springs 1, in that the coil springs 4 are also abreastrbut the coil springs 3 l and 4 are in reversed relation in that the oiiset portions 'l of coil springs 1 and! of adjacent rows are in opposed relation and are substantially aligned longitudinally of the assembly to be enmet! by the same helical 5. The helical -5 en- 9 gages alternately a bulged oflset 8 anda straight oi'iset portion 7 and desirably terminates and is anchored at the outermost bulged oiiset nearest the marginal helical at the end of the assembly. The helical is advantageously knotted as at 9 upon the bulged oflset 8. By knotting the helical,

I mean forming a closed loop preferably reduced in diameter, to have an internal diameter substantially'equal to the material of the coil spring, as best shown in Fig. 5. Since the bulged 011-. sets are just large enough to accommodate the knot 9, the knot is prevented from slipping, thus guarding against displacement of the parts, maintaining the uniform size of the assembly, restraining lateral movement oi the and springs, and avoiding objectionable clicking. At the same time the coilsprings aremaintained in spaced relation by a loop oi. the helical interposed betweentheoflsetsasatl0,thusguarding against overlapping or the coil sprlngs'and further pre- 1'10 straight portions 11.to provide a better anchorage for the connecting helical. The peripherally projecting offsets 12 are aligned with the elon-.-

gated straight portions 11 and these are perpendicular to the straight oflfset portions 7. Thus the interior helicals 5 and the marginal helicals 52) at the ends of the assembly are entirely independent of each other and are in perpendicular relationship, whereby the end springs are further stabilized and held from lateral movement.

Desirably, substantially straight portions 14 of the terminal coils 5a are intermediate the bulged oilsets 8, 8 and 13, 13, these straight portions 14 lying alongside and contacting with the-helicals 5 or 5b, as the case may be, thus Iurthercon tributing to the maintenance of normal stability or the assembly. All of the marginal coils are advantageously abreast of each other, thus maintaining the uniform margin for the assembly.

80 constructed and arranged, I have provided a spring assembly which will maintain underall conditions its uniform size. and shape andisat the same time highly flexible and noiseless.

Obviously, the invention is not limited to the specific details of construction here shown for exempliflcation. Furthermore, it is not indispensabl'ethat all features of the invention be employed conjointly, as they may be advantageo'us'ly used in various combinations and subcombinations.

I claim A'spring assembly having parallellongitudinal rows of spiral springs, springs atone end of the assembly having straight portions transversely aligned with similar portions of other springs at said end and in staggered relation to other portions of said other springs at said end, the intermediate springs of said end springs having elon'fgated straight portions transversely aligned with each other but perpendicular to the first-mentioned straight portions and the comer end springs having respectively peripherally projecting offsets transversely aligned with each other and with said elongated straight portions, a marginal helical encircling said elongated straight portions and said offsets, and a plurality of interior helicals extending in the direction of said rows between the rows and engaging successively the staggered portions of springs of adjacent rows, each interior helical terminating at and being knotted upon one of said staggered portions in eachjrow nearest the marginal helical, whereby said end springs are held from relative lateral movementby I separated connecting helicals threaded 'on straight aligned portions of thesprings extending in relatively perpendicular directions. l

EQWUNDERLICH. 

